<template>
<div>
<button @ click=" clickHandler" >Call father</button>
</div>
</template>
<script>
export default{
    date(){
        return{
            subject:"Web前端框架技术",
            score:88,
        };
    },
    methods:{
        clickHandler(){
            this.$emit("score",this.subject,this.score);
        },
    },
};
<script >
<style>
<style>
